Open a disk image and trimming for a picture control

Hi people,

I try to let my users (in a browser) to select/open a disk file (image type) so that they can see and then save it to the server. I can use the FileReference object very well and load its 'result' directly in a MX:Image control. However, before I do that I want to crop the selected image square. I also want to resize the image down, but that will come later, once I get the job of cropping.

I'm essentially taking the FileReference result bytearray and conversion to a BitmapData object. Then I 'extract' a place of this BitmapData object data in a new BitmapData object. Then I need to get * that * BitmapData object in the mx:image control. I tried to use a Bitmap of the to do, but the mx:image that results, while the 'companies' displays correctly, as a white Virgin region. Throughout, the variables seem to be "complete" data and seem to have developed properly. I looked at a few sites that show images cropping and copies, but they always start with images 'preload '. I modeled my code after them, if necessary.

Here is my code:

This is called when the user clicks a button to "search for a file on disk.

private function setPhoto (): void
{
create the instance of FileReference
_fileRef = new FileReference();

_fileRef.addEventListener (Event.SELECT, onFileSelected);

Look for the file has been opened
_fileRef.addEventListener (Event.COMPLETE, onFileLoaded);

var arr:Array = [];
arr.push (new FileFilter ("Images", ".gif"; *.JPEG; *.jpg, *.png");
_fileRef.browse (arr); Then let go and leave the event managers treat the result...

}

private void onFileSelected(evt:Event):void
{
_fileRef.load (); the result of the "load" will be managed by the Manager of 'complete '.
}

private void onFileLoaded(evt:Event):void
{
var tempLoader:Loader = new Loader();
tempLoader.loadBytes (_fileRef.data);
tempLoader.contentLoaderInfo.addEventListener (Event.COMPLETE, onLoaderComplete);

imgPhoto.source = _fileRef.data; This would work fine, however, it would not be cropped
}

private void onLoaderComplete(event:Event):void
{
var loaderInfo:LoaderInfo = LoaderInfo (event.target);
var loadBD:BitmapData = new BitmapData (loaderInfo.width, loaderInfo.height);
OK, now that we have the 'original' file into the bitmap data, we can crop and then resize it later
so, we need a "place" of the image cropped from the original
so... First, we get a square of the image of "size".
If the image is larger than the scale, we will take a place as large as the image and as high as it is wide, from 5% down from the top
If the image is larger that high, we will take a square as large as the image and as wide as it is high, horizontal Middle
var curW:int = loadBD.width;
var curH:int = loadBD.height;
var cropX:int = 0;
var cropY:int = 0;
var cropW:int = curW;
var cropH:int = Uchr;
var needCrop:Boolean = true; default is to crop
var croppedBD:BitmapData;

If (Uchr > curW)
{
cropY = Math.round (Uchr *. 05); departure at 5% down
cropH = cropW;
}
ElseIf (curW > Uchr)
{
cropX = Math.round (curW/2) - Math.round (Uchr/2); start in the Middle, 'back' by half the height
cropW = cropH;
}
on the other
{
needCrop = false; It's already a square! nothing to do (except for resizing)
}

If (needCrop)
{
croppedBD = new BitmapData (cropW, cropH); at this point, it is 'empty', then the full
var fillPoint:Point = new Point (0,0); given that we will fill in the upper, left pixel and rollover
var fillRect:Rectangle = new Rectangle (cropY, cropW, cropX, cropH);
croppedBD.copyPixels (loadBD, fillRect, fillPoint);
}
on the other
{
croppedBD = loadBD;
}

imgPhoto.source = new Bitmap (croppedBD); The result is an appropriate size, but the image in white-white
}

And here is the mxml for the image:

< mx:Image id = "imgPhoto" x = "40" y = "126" maxWidth = "200" maxHeight = "200" / >

Thank you!

-David

Hello

You've been around the solution.

In "onLoaderComplete(event:Event):void", at the beginning, you create a BitmapData called 'loadBD', you forgot just to fill it with the content of the loaderInfo.

private void onLoaderComplete(event:Event):void {}

var loaderInfo:LoaderInfo = LoaderInfo (event.target);

var loadBD:BitmapData = new BitmapData (loaderInfo.width, loaderInfo.height);

loadBD.draw (loaderInfo.content);

......

Kind regards

Mich

Tags: Flex

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